Unreal Engine Issues

RestrictedToClasses UCLASS Meta expects space delimiters but documentation shows comma delimiters

The documentation: https://docs.unrealengine.com/en-US/Programming/UnrealArchitecture/Reference/Metadata/index.html shows the RestrictedToClasses meta syntax as being RestrictedToClasses="Class1, C ...

UPaperGroupedSpriteComponent does not override handling for its multiple FBodyInstances

UPaperGroupedSpriteComponent does not properly update its physics data at runtime, due to relying on the inherited UPrimitiveComponent functions that do not handle its multiple FBodyInstances. ...

UHT fails to parse non-inlined UFUNCTION with RESTRICT keyword in parameter list

When you have a non-inlined ufunction, UHT fails to parse the restrict keyword in its parameter list. Note: The following compiles (notice that the only change is the use of the FORCEINLINE keywo ...

Draw Post Process Material to Render Target cannot use SceneTexture

Draw Post Process Material to Render Target cannot use SceneTexture. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 7053642, 4.23 CL# 7062535 ...

Previous Tangent Recalc` and Size by Life misbehave at low FPS

At low FPS particle systems with "Previous Tangent Recalculation" enabled in the Ribbon Data result in messy mesh generation. Found in 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6925347, and 4.24 ...

Stationary Spot Lights in Forward Rendering Incorrectly with PerVertex NonDirectional Translucency

Stationary Spot Lights in Forward Rendering cause artifacts when lighting transluceny set to Volumetric PerVertex NonDirectional. When the camera is moved around the object, the lit vertices flicker ...

Fail to save level with a Blueprint component containing User Data

Using Interpolative Animation Data into 'Make Dynamic Additive' gives warning "Trying to play a non-additive animation into a pose that is expected to be additive in anim instance"

Feeding Interpolative non-additive Data into Make Dynamic Additive gives a Warning "Trying to play a non-additive animation  into a pose that is expected to be additive in anim instance" AnimBluepr ...

Enabling Omni Directional Stereo Capture Breaks Draw Material to Render Target Functionality

Enabling ODS (omni directional stereo capture) in project breaks Draw Material to Render Target functionality. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6836133 ...

Component icon changes when undoing the adding of blueprint components

When the user adds two blueprint components to an actor blueprint, compiles the component blueprint, and then undoes adding one of them, the icon for the remaining component changes. This doesn't o ...